Different result with the same MongoShell and Node.js query?

Question

MongoDB

Hello!
I just can’t understand, I wanted to get the “B183” object, make a request through NODE.js, as a result I get the entire document, I try through mongoShell getting the desired part of the document

Request:

db.subjects.find(
  {"ФизМат.Педагогические науки.B183": {$exists: true}}, 
  {
    _id: 1, 
    "ФизМат.Педагогические науки.B183": 1 
  }
)

"Database"

"ГеоБио": {
  "Педагогические науки": {
    "B001": {
      "code": "B001",
      "name": "Педагогика и психология",
      "max": " 140",
      "min": " 97",
      "minWithQuota": " 91"
    }
  }
},
"ФизМат": {
  "Педагогические науки": {
    "B183": {
      "code": "B183",
      "name": "Агроинженерия",
      "max": "140",
      "min": " 50",
      "minWithQuota": "none",
      "quotes": []
    }
  }
}

Answer 1

collection . find
The second argument is options . projection
Shell and drivers are different things